EP3027978B1 - Refrigerating circuit, facility comprising such a circuit and corresponding method - Google Patents

Description

The present invention relates generally to installations and methods for heating and cooling fluids, in particular for a building.

Heating and cooling installations of fluids, of the heat pump type, are known from the state of the art. Thus, the document " The simultaneous production of chilled water and hot water at 95 ° C by a thermofrigopump in a dairy ", written in 1982 by E. Lecrivain, G. Laroche and A. Vallot , in the Revue Internationale du Froid, describes an installation made up of two refrigeration circuits in cascade making it possible to supply water at 95 ° C and chilled water. Such an installation makes it possible to save a significant amount of energy compared with an equivalent installation which would be composed of a refrigerating unit and a gas boiler.

The document US4299098 discloses a refrigeration circuit for heating or cooling a space, producing a hot liquid, or cooling a space and simultaneously producing a hot liquid.

However, the functionalities offered by these installations known from the state of the art are limited and / or their complexity has proved to be a source of problems.

It is therefore desirable to develop a new installation for heating and cooling fluids providing a gain in energy efficiency compared to the usual solutions, while using a minimum of refrigerant and allowing the activation of different operating modes to respond the heating and cooling needs of fluids in a building, in a simplified architecture.

The object of the present invention is to propose a new installation for heating and cooling fluids proposing an architecture allowing the heating of a fluid, for example for the production of domestic hot water and / or the heating of the building, and cooling. of another fluid, both simultaneously and independently of each other.

Another object of the invention is to provide a new installation for heating and cooling fluids using a minimum of refrigerant.

Another aim of the invention is to limit the energy consumption of the installation.

Another object of the invention is also to provide an installation for heating and cooling fluids making it possible to defrost, with reduced energy consumption, the part of the installation subjected to frost.

• un compresseur,
• un échangeur, appelé échangeur condenseur, comprenant un circuit condenseur,
• un échangeur, appelé échangeur d'équilibrage, comprenant un circuit appelé circuit condenseur/évaporateur apte à fonctionner soit en condenseur soit en évaporateur, et de préférence un ventilateur associé audit échangeur d'équilibrage,
• un premier nœud de liaison entre une branche du circuit frigorifique munie de l'échangeur condenseur et une branche du circuit frigorifique munie de l'échangeur d'équilibrage, ledit nœud de liaison étant situé du côté de la sortie de l'échangeur condenseur,
• un échangeur, appelé échangeur évaporateur, comprenant un circuit évaporateur,
• un premier dispositif de gestion de fluide comprenant quatre voies, dont une première voie, appelée voie d'entrée, raccordée à la sortie du compresseur, une deuxième voie, appelée voie basse pression, une troisième voie raccordée à l'échangeur d'équilibrage du côté opposé au premier nœud de liaison, et une quatrième voie raccordée à l'entrée dudit échangeur condenseur ;
• un deuxième dispositif de gestion de fluide comprenant quatre voies, dont une première voie, appelée voie d'entrée, raccordée audit premier nœud de liaison, une deuxième voie, appelée voie basse pression, une troisième voie raccordée à l'entrée de l'échangeur évaporateur, et une quatrième voie raccordée à l'échangeur d'équilibrage entre le premier nœud de liaison et le circuit condenseur/évaporateur de l'échangeur d'équilibrage ;
• un premier détendeur situé entre la troisième voie du deuxième dispositif de gestion de fluide et l'échangeur évaporateur, et
• un deuxième détendeur situé entre la quatrième voie du deuxième dispositif de gestion de fluide et l'échangeur d'équilibrage,

les deuxièmes voies des dispositifs de gestion étant raccordées à une branche du circuit frigorifique qui s'étend entre la sortie du circuit évaporateur de l'échangeur évaporateur et l'entrée du compresseur,
chaque dispositif de gestion de fluide étant configuré pour présenter une première configuration selon laquelle la voie d'entrée est mise en communication avec la troisième voie, la voie basse pression étant mise en communication avec la quatrième voie,
et une deuxième configuration dans laquelle la voie d'entrée est mise en communication avec la quatrième voie, la voie basse pression étant mise en communication avec la troisième voie.To this end, the invention relates to a refrigeration circuit for an installation, called a thermofrigopump, for heating and / or cooling fluids, comprising:

• a compressor,
• an exchanger, called a condenser exchanger, comprising a condenser circuit,
• an exchanger, called a balancing exchanger, comprising a circuit called a condenser / evaporator circuit able to operate either as a condenser or as an evaporator, and preferably a fan associated with said balancing exchanger,
• a first connection node between a branch of the refrigeration circuit fitted with the condenser exchanger and a branch of the refrigeration circuit fitted with the balancing exchanger, said link node being located on the outlet side the condenser exchanger,
• an exchanger, called an evaporator exchanger, comprising an evaporator circuit,
• a first fluid management device comprising four channels, including a first channel, called the inlet channel, connected to the outlet of the compressor, a second channel, called the low pressure channel, a third channel connected to the balancing exchanger of the side opposite to the first link node, and a fourth channel connected to the inlet of said condenser exchanger;
• a second fluid management device comprising four channels, including a first channel, called the inlet channel, connected to said first link node, a second channel, called the low pressure channel, a third channel connected to the inlet of the exchanger evaporator, and a fourth channel connected to the balancing exchanger between the first link node and the condenser / evaporator circuit of the balancing exchanger;
• a first regulator located between the third channel of the second fluid management device and the evaporator exchanger, and
• a second regulator located between the fourth channel of the second fluid management device and the balancing exchanger,

the second channels of the management devices being connected to a branch of the refrigeration circuit which extends between the outlet of the evaporator circuit of the evaporator exchanger and the inlet of the compressor,
each fluid management device being configured to have a first configuration according to which the inlet channel is placed in communication with the third channel, the low pressure channel being placed in communication with the fourth channel,
and a second configuration in which the inlet path is placed in communication with the fourth path, the low pressure path being placed in communication with the third path.

As detailed below, such an installation makes it possible to benefit from simultaneous or alternating production of hot fluid and cold fluid that can be used for heating, production of domestic hot water, and cooling, in particular for a building, for example of the residential or tertiary type.

The balancing exchanger makes it possible to adjust the production of hot and cold by switching from one mode to another by controlling the fluid management devices so that in certain modes the balancing exchanger operates as a condenser and in other modes the balancing exchanger operates as an evaporator.

Thanks to the connection of each second channel (low pressure channel) to the part of the refrigeration circuit located downstream of the evaporator exchanger and upstream of the compressor, the four-way management devices make it possible to connect, depending on the operating mode activated, the unused exchangers from the refrigeration circuit to the low pressure part of the refrigeration circuit, while placing the exchangers used in this operating mode in communication with each other.

This specificity of the architecture of the refrigeration circuit which makes it possible to connect the unused exchangers to the low pressure part, acts as a vacuum in the unused parts of the refrigeration circuit and makes it possible to reintegrate the refrigerant into the useful parts of the circuit. refrigeration by avoiding the trapping of refrigerant in parts of the circuit not in use.

In particular, the fact of being able to connect the second channel (low pressure channel) of the first management device with the fourth channel connected to the condenser exchanger or even the third channel connected to the balancing exchanger, allows, when said condenser exchanger or balancing exchanger is not active, due to the selected operating mode of the installation, to cause the refrigerant vapor, trapped in these exchangers, to migrate into the active low pressure part of the circuit refrigerated. Likewise, the connection of the outlet of the evaporator exchanger to the low-pressure part allows, when said evaporator exchanger is inactive, to recover in the active low-pressure part of the refrigeration circuit. the refrigerant vapors remaining in said evaporator exchanger.

It is thus possible to reduce the refrigerant circuit charge to the minimum necessary for the operating mode which requires the most charge.

According to a preferred embodiment of the invention, the refrigeration circuit also comprises an exchanger, called a sub-cooler exchanger, which comprises a first heat transfer circuit arranged between the inlet channel of the second management device and the first node connection, and preferably disposed between said inlet passage and a bottle of liquid. As detailed below, the use of such a sub-cooler exchanger makes it possible to recover and store energy for use in deferred time in order to improve the heating performance of the fluid and / or to defrost the fluid. 'balancing exchanger.

According to an advantageous characteristic of the invention, said first fluid management device is a 4-way valve which comprises a member, called a slide, movable between two positions corresponding respectively to said first and second configurations of the first fluid management device. According to an advantageous characteristic of the invention, said second fluid management device is a 4-way valve which comprises a member, called a slide, movable between two positions corresponding respectively to said first and second configurations of the second fluid management device.

The design of such a communication architecture between the exchangers of the refrigeration circuit and the use of two 4-way valves makes it possible to use only a reduced number of actuators to control the different operating modes of the installation, and thus reduce the cost and improve the reliability of the installation, and optimally manage the refrigerant charge.

Indeed, the use of two 4-way valves to distribute the refrigerant in the exchangers used in the different modes simplifies the transition from one mode to another compared to a solution with four 2-way solenoid valves. The number of actuators and PLC outputs is therefore limited.

In addition, as detailed below, the connection of the second channel of each management device to the inlet of an anti-blow bottle of liquid, the outlet of which is itself connected to the inlet of the compressor, makes it possible to ensure a pressure difference between the pairs of channels of the management device placed in communication in order to ensure proper movement of the drawer of the corresponding management device. Indeed, each second channel is put at low pressure by its connection with the inlet of the anti-blow bottle of liquid. The channel of the management device placed in communication with this second channel is then also brought to low pressure, and the input channel of each management device, as well as the channel with which said input channel is placed in communication , are at high pressure.

Advantageously, said circuit comprises an additional exchanger, arranged in series with the condenser exchanger, between said first link node and the fourth channel of the first management device.

Thus, as detailed below, one of the two exchangers can be used for heating domestic hot water and the other for heating a heating circuit fluid. As a variant, said two exchangers can be used to heat a fluid, gas or liquid, to two different temperature levels.

According to an advantageous characteristic of the invention, said circuit comprises a reservoir, called an anti-blow bottle of liquid, positioned between the compressor and the connection of the second channels of the management devices.

The use of an anti-blow bottle of liquid thus positioned upstream of the compressor makes it possible to ensure that the compressor is indeed supplied with fluid in the vapor state and not in the liquid state. Any fluid in the liquid state entering the bottle would be trapped in the bottle and then naturally vaporized before suction by the compressor.

The invention also relates to an installation comprising a refrigeration circuit as described above, characterized in that, the condenser exchanger comprising a heat transfer circuit, said installation comprises a heating circuit which comprises said heat transfer circuit. 'condenser exchanger, a circulation pump, and preferably a fluid storage tank, called a hot water tank,
and in that, the evaporator exchanger comprising a heat transfer circuit, said installation comprises a cooling circuit which comprises said evaporator exchanger transfer circuit, a circulation pump, and preferably a fluid storage tank , called cold fluid balloon.

According to an advantageous characteristic of the invention, the sub-cooler exchanger comprising a second transfer circuit, said second transfer circuit of the sub-cooler exchanger is mounted on the cooling circuit bypassing the transfer circuit of the evaporator exchanger.

In particular, a first solenoid valve is positioned between the inlet of the transfer circuit of the evaporator exchanger and the connection of the inlet of the second transfer circuit of the sub-cooler exchanger to the cooling circuit. Likewise, a second solenoid valve is positioned between the inlet of the second transfer circuit of the sub-cooler exchanger and the connection of this inlet of the second transfer circuit of the sub-cooler exchanger to the cooling circuit.

Such a solenoid valve arrangement makes it possible to control the passage of fluid from the cooling circuit through the sub-cooler exchanger or through the evaporator exchanger.

According to an advantageous characteristic of the invention, the installation comprises a control unit comprising control means for controlling the stopping and running of each of the circulation pumps, independently of one another, and of

• le positionnement du tiroir du premier ou deuxième dispositif de gestion de fluide en première ou deuxième position ;
• la mise en marche ou arrêt du ventilateur de l'échangeur d'équilibrage ;
• la mise en marche ou arrêt de la pompe du circuit de chauffage ;
• la mise en marche ou arrêt de la pompe du circuit de refroidissement ;
• la mise en marche ou arrêt de la pompe du circuit de production d'ECS ;
• la commande de l'électrovanne en entrée de l'échangeur sous-refroidisseur ;
• la commande de l'électrovanne en entrée de l'échangeur évaporateur.

order the various components of the installation to obtain the desired operating mode, and in particular:

• positioning the slide of the first or second fluid management device in the first or second position;
• the switching on or off of the balancing exchanger fan;
• switching the heating circuit pump on or off;
• switching on or off the cooling circuit pump;
• the starting or stopping of the pump of the DHW production circuit;
• control of the solenoid valve at the inlet of the sub-cooler exchanger;
• control of the solenoid valve at the inlet of the evaporator exchanger.

• pour chacun des premier et deuxième dispositifs de gestion, mise en communication de la quatrième voie avec la première voie ;
• activation de la pompe du circuit de chauffage,
• de préférence activation du ventilateur associé à l'échangeur d'équilibrage.

According to an advantageous characteristic of the invention, the installation comprises a control unit configured to execute a sequence of instructions, called heating mode, comprising the following steps:

• for each of the first and second management devices, placing the fourth channel in communication with the first channel;
• activation of the heating circuit pump,
• preferably activation of the fan associated with the balancing exchanger.

• pour le premier dispositif de gestion, mise en communication de la première voie avec la quatrième voie ;
• pour le deuxième dispositif de gestion, mise en communication de la première voie avec la troisième voie ;
• activation de la pompe du circuit de chauffage et de la pompe du circuit de refroidissement.

According to an advantageous characteristic of the invention, the installation comprises a control unit configured to execute a sequence of instructions, called simultaneous mode, comprising the following steps:

• for the first management device, placing the first channel in communication with the fourth channel;
• for the second management device, placing the first channel in communication with the third channel;
• activation of the heating circuit pump and the cooling circuit pump.

• en mode chauffage, activer la pompe du circuit de refroidissement et commander les électrovannes de manière à laisser circuler le fluide du circuit de refroidissement à travers le deuxième circuit de transfert de l'échangeur sous-refroidisseur, et le ballon correspondant.

According to an advantageous characteristic of the invention, the installation comprises a control unit configured to execute a sequence of instructions, called energy storage mode, comprising the following steps:

• in heating mode, activate the cooling circuit pump and control the solenoid valves so as to allow the cooling circuit fluid to circulate through the second transfer circuit of the sub-cooler exchanger, and the corresponding tank.

According to an advantageous characteristic of the invention, the control unit is configured to execute a sequence of instructions, called mode of use of the energy stored on the cooling circuit, which comprises the following steps; in deferred time and in an operating mode the installation corresponding to the simultaneous mode or to the cooling mode preferably without ventilation, activate the cooling circuit pump and control the solenoid valves so as to let the hot fluid contained in the cooling circuit tank circulate through the cooling circuit the evaporator exchanger.

• pour chaque dispositif de gestion, mise en communication de la première voie avec la troisième voie ;
• activation de la pompe du circuit de refroidissement,
• de préférence activation du ventilateur associé à l'échangeur d'équilibrage.

According to an advantageous characteristic of the invention, the installation comprises a control unit configured to execute a sequence of instructions, called refresh mode, comprising the following steps:

• for each management device, placing the first channel in communication with the third channel;
• activation of the cooling circuit pump,
• preferably activation of the fan associated with the balancing exchanger.

• pour le premier dispositif de gestion mise en communication de la première voie avec la quatrième voie ;
• pour le deuxième dispositif de gestion mise en communication de la première voie avec la troisième voie ;
• activation de la pompe du circuit ECS et de la pompe du circuit de refroidissement.

According to an advantageous characteristic of the invention, said heating circuit being a domestic hot water heating circuit, called DHW circuit, said installation comprises a control unit configured to execute a sequence of instructions, called simultaneous DHW mode, comprising the following steps:

• for the first management device placing the first channel in communication with the fourth channel;
• for the second management device placing the first channel in communication with the third channel;
• activation of the DHW circuit pump and the cooling circuit pump.

• pour chaque dispositif de gestion, mise en communication de la première voie avec la quatrième voie ;
• activation de la pompe du circuit ECS et de préférence du ventilateur associé à l'échangeur d'équilibrage.

According to an advantageous characteristic of the invention, said heating circuit being a domestic hot water heating circuit, called DHW circuit, said installation comprises a control unit configured to execute a sequence of instructions, called DHW only mode, comprising the following steps:

• for each management device, communication of the first channel with the fourth way;
• activation of the DHW circuit pump and preferably of the fan associated with the balancing exchanger.

• pour chaque dispositif de gestion, mise en communication de la première voie avec la troisième voie ;
• les électrovannes sont commandées de manière à empêcher la circulation de fluide du circuit de refroidissement par le deuxième circuit de transfert de l'échangeur sous-refroidisseur et à permettre la circulation dudit fluide par le circuit de transfert de l'échangeur évaporateur,
• activation de la pompe du circuit de refroidissement,
• de préférence, arrêt du ventilateur associé à l'échangeur d'équilibrage.

According to an advantageous characteristic of the invention, the installation comprises a control unit configured to execute a sequence of instructions, called defrost mode, comprising the following steps:

• for each management device, placing the first channel in communication with the third channel;
• the solenoid valves are controlled so as to prevent the circulation of fluid from the cooling circuit through the second transfer circuit of the sub-cooler exchanger and to allow the circulation of said fluid through the transfer circuit of the evaporator exchanger,
• activation of the cooling circuit pump,
• preferably, stopping the fan associated with the balancing exchanger.

When operating in heating mode, the balancing exchanger operates as an evaporator. When the outside temperatures are below approximately 6 ° C (and particularly when they are between 0 ° C and 6 ° C), the accumulation of frost on the balancing exchanger significantly degrades the performance of the installation. Therefore, it is useful to include an efficient defrost system in order to ensure high energy efficiency and preferably continuous hot water production. The defrosting method used is similar to a cycle reversal as a means of removing frost from the balancing exchanger. In fact, the balancing exchanger operates alternately either as an evaporator or as a condenser. This makes it possible, when switching to defrost mode, to directly inject the hot gases at the compressor discharge into the air exchanger. In this sequence, the evaporator exchanger is connected to the cold fluid tank which has previously stored hot fluid. The energy previously recovered and stored in the cold fluid tank is then used to ensure the evaporation of the refrigerant. This method of defrosting makes it possible not to draw energy from the heating tank and in this respect constitutes an advantage over the state of the art. Indeed, calculations resulting from experimental measurement demonstrate that the seasonal efficiency (COP) is improved by 13% due to this defrost solution.

In defrost mode, the operating logic of the installation corresponds to operation of the refrigeration circuit in cooling mode, preferably without ventilation. Turning off the fan helps to direct the heat transfer more towards the frost layer and saves electrical energy.

The invention also relates to a method for heating and / or cooling fluids using an installation as described above.

• la figure 1 est une vue schématique de l'installation selon l'invention couplée à un ensemble de réseaux de distribution de fluide ;
• la figure 2 est une vue du système de récupération de fluide chaud de l'installation selon l'invention, en configuration de stockage de fluide chaud dans un ballon ;

• la figure 2A est une vue du système de récupération de fluide chaud de l'installation selon l'invention, en configuration de circulation du fluide chaud, précédemment stocké, à travers l'échangeur évaporateur ;
• la figure 3 est une vue schématique de l'architecture du circuit frigorifique de l'installation selon l'invention ;
• la figure 4 est une vue du circuit frigorifique de la figure 3 selon un premier mode de fonctionnement, appelé mode chauffage ;
• la figure 5 est une vue du circuit frigorifique de la figure 3 selon un deuxième mode de fonctionnement, appelé mode simultané ;
• la figure 6 est une vue du circuit frigorifique de la figure 3 selon un troisième mode de fonctionnement, appelé mode rafraichissement ;
• la figure 7 est une vue du circuit frigorifique de la figure 3 selon un quatrième mode de fonctionnement, appelé mode ECS simultané;
• la figure 8 est une vue du circuit frigorifique de la figure 3 selon un cinquième mode de fonctionnement, appelé mode ECS;
• la figure 9 est une vue du circuit frigorifique de la figure 3 selon un sixième mode de fonctionnement, appelé mode dégivrage;
• la figure 10 est une vue schématique de l'installation selon l'invention, montrant des sondes de mesure associées à différents composants de l'installation ;
• les figures 11 à 13 présentent des schémas logiques basés sur des thermostats différentiels et comparateurs logiques exprimant des besoins en chauffage, rafraîchissement et eau chaude sanitaire et dégivrage ;
• les figures 14 à 16 sont des graphiques illustrant des essais de performance réalisés sur un prototype de thermofrigopompe conforme à l'invention.

The invention will be clearly understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:

• the figure 1 is a schematic view of the installation according to the invention coupled to a set of fluid distribution networks;
• the figure 2 is a view of the hot fluid recovery system of the installation according to the invention, in hot fluid storage configuration in a balloon;

• the figure 2A is a view of the hot fluid recovery system of the installation according to the invention, in the circulation configuration of the hot fluid, previously stored, through the evaporator exchanger;
• the figure 3 is a schematic view of the architecture of the refrigeration circuit of the installation according to the invention;
• the figure 4 is a view of the refrigeration circuit of the figure 3 according to a first operating mode, called heating mode;
• the figure 5 is a view of the refrigeration circuit of the figure 3 according to a second operating mode, called simultaneous mode;
• the figure 6 is a view of the refrigeration circuit of the figure 3 according to a third operating mode, called refresh mode;
• the figure 7 is a view of the refrigeration circuit of the figure 3 according to a fourth operating mode, called simultaneous DHW mode;
• the figure 8 is a view of the refrigeration circuit of the figure 3 according to a fifth operating mode, called DHW mode;
• the figure 9 is a view of the refrigeration circuit of the figure 3 according to a sixth operating mode, called defrost mode;
• the figure 10 is a schematic view of the installation according to the invention, showing measurement probes associated with different components of the installation;
• the figures 11 to 13 present logic diagrams based on differential thermostats and logic comparators expressing heating, cooling and domestic hot water and defrost needs;
• the figures 14 to 16 are graphs illustrating performance tests carried out on a prototype heat pump according to the invention.

Referring to the figures, there is shown an installation, called thermofrigopompe 1, for heating and cooling fluids, for example in a residential or tertiary building. Of course, industrial applications of such an installation are also possible. In the example illustrated in the figures and as detailed below, said installation makes it possible to heat the fluid of a heating circuit, to produce domestic hot water (DHW), and to cool the fluid of a heating circuit. air conditioning type cooling. Thanks to the architecture detailed below of the installation, these functions can be activated simultaneously or independently.

Said installation comprises a refrigerant circuit 2 with refrigerant fluid which comprises a compressor 200. Said compressor 200 makes it possible to compress refrigerant vapor. Preferably, said installation comprises a reservoir 201 called an anti-blow bottle of liquid.

Said anti-blow liquid bottle 201 has an inlet and an outlet connected to the inlet of the compressor 200. Said anti-blow liquid bottle 201 is configured such that the fluid leaving said bottle is in the vapor state. even if some of the incoming fluid contains drops of liquid.

The refrigeration circuit 2 also comprises an exchanger 21, called the DHW exchanger, which comprises a condenser circuit, that is to say a circuit capable of ensuring the condensation of the refrigerant, and a circuit, called a transfer circuit connected to a circuit. 31 for producing domestic hot water, called DHW circuit 31 to allow, by heat transfer from the condenser circuit to the transfer circuit of said exchanger 21, to heat the water of said DHW circuit 31. As a variant, provision can be made that the circuit 31 contains a fluid which may be a gas or a liquid intended to be brought to high temperature, that is to say to at least 55 ° C.

Said DHW circuit 31 comprises said transfer circuit of the ECS exchanger 21, a circulation pump 310, and preferably a fluid storage tank, called a domestic hot water tank 311.

Similarly, the refrigeration circuit 2 also comprises an exchanger 22, called heating exchanger, which comprises a condenser circuit, that is to say a circuit capable of condensing the refrigerant, and a circuit, called transfer circuit, connected to a heating circuit 32 to allow, by transfer of heat from the condenser circuit to the transfer circuit of said exchanger 22, to heat the fluid of said heating circuit 32. The fluid can be a gas or a liquid.

Said heating circuit 32 comprises said transfer circuit of the heating exchanger 22, a circulation pump 320, and preferably a fluid storage tank, called a hot water tank 321.

The exchangers 21, 22 are arranged in series on the same branch of the refrigeration circuit. The exchanger 21 is positioned upstream of the exchanger 22.

Another branch of the refrigeration circuit also comprises an exchanger 25, called a balancing exchanger, which comprises a circuit, called a condenser / evaporator circuit, able to operate either as a condenser or as an evaporator depending on the operating mode of the installation as detailed below. -after.

In the example illustrated in the figures, the balancing exchanger 25 operates by heat exchange between said fluid flowing through the condenser / evaporator circuit and air. Preferably, a fan is arranged with the exchanger 25 to generate a forced convection movement around the balancing exchanger 25. As a variant, provision can be made for the medium with which the condenser / evaporator circuit of said balancing exchanger exchanges to be another fluid circuit forming a heat transfer circuit.

Said refrigeration circuit 2 has a first link node NL1 between the branch of the refrigeration circuit 2 provided with exchangers 21, 22 DHW and heating and the branch of the refrigeration circuit 2 provided with the exchanger 25 balancing. Said link node NL1 is located on the outlet side of exchanger 22.

The circuit comprises an exchanger 23, called an evaporator exchanger, which has an evaporator circuit, that is to say a circuit capable of vaporizing the refrigerant, the outlet of which is connected to the inlet of the anti-shock bottle 201. liquid, and a transfer circuit connected to a cooling circuit 33, to allow, by heat transfer from the transfer circuit to the evaporator circuit of said evaporator exchanger 23, to cool the fluid of said cooling circuit 33. Said fluid of the cooling circuit cooling 33 can be a gas or a liquid.

Said cooling circuit 33 comprises said evaporator exchanger transfer circuit 23, a circulation pump 330, and preferably a fluid storage tank, called a cold fluid balloon 331.

The presence of the balloons 311, 321, 331 makes it possible to decouple the production of cold fluid and of hot fluid, from the distribution to the corresponding networks 4.

For each circuit 31, 32, 33, the corresponding circulation pump 310, 320, 330 is placed between the exchanger 21, 22, 23 and the corresponding tank 311, 321, 331.

• Le circuit frigorifique 2 qui permet la production de l'énergie calorifique ou frigorifique simultanée ou alternée,
• l'ensemble des circuits hydrauliques 31, 32, 33 reliés aux différents réseaux 4 de distribution, ici un réseau de fluide froid, un réseau d'eau chaude et un réseau d'eau chaude sanitaire.

The heat pump 1 thus comprises two sets:

• The refrigeration circuit 2 which allows the production of heat or cooling simultaneously or alternately,
• all the hydraulic circuits 31, 32, 33 connected to the various distribution networks 4, here a cold fluid network, a hot water network and a domestic hot water network.

• une première voie, appelée voie d'entrée 511, raccordée à la sortie du compresseur 200,
• une deuxième voie, appelée voie basse pression 512, raccordée à l'entrée de la bouteille 201 anti-coup de liquide, c'est-à-dire raccordée à une partie basse pression du circuit frigorifique 2,
• une troisième voie 513 est raccordée au circuit condenseur/évaporateur de l'échangeur 25 d'équilibrage du côté dudit échangeur opposé au premier nœud de liaison NL1 ; et
• une quatrième voie 514 est raccordée à l'entrée du circuit condenseur dudit échangeur 21 de chauffage.

A first fluid management device 51 makes it possible to direct and / or stop the circulation of fluid between the components, in particular the exchangers, of the refrigeration circuit. Said first fluid management device 51 comprises four channels, including:

• a first channel, called the input channel 511, connected to the output of the compressor 200,
• a second channel, called the low pressure channel 512, connected to the inlet of the anti-liquid shock bottle 201, that is to say connected to a low pressure part of the refrigeration circuit 2,
• a third channel 513 is connected to the condenser / evaporator circuit of the balancing exchanger 25 on the side of said exchanger opposite to the first link node NL1; and
• a fourth channel 514 is connected to the input of the condenser circuit of said heating exchanger 21.

Said refrigeration circuit also comprises a second fluid management device 52 also comprising four channels, including a first channel, called the inlet channel 521, connected to said first link node NL1 by means of a liquid bottle 202. As detailed below, the connection between this input channel 521 and the first link node NL1 is made by means of a sub-cooler exchanger 24. A second channel, called the low-pressure channel 522, is connected to the inlet of the anti-liquid shock bottle 201, corresponding to a low pressure part of the refrigeration circuit 2. A third channel 523 is connected to the inlet of the liquid. evaporator exchanger 23, and a fourth channel 524 is connected to balancing exchanger 25, between the first link node NL1 and balancing exchanger 25, via a node NL3.

Each fluid management device 51, 52 is a 4-way valve which comprises a member, called a slide, movable between a first position and a second position. In said first position, the input channel 511, 521 is placed in communication with the third channel 513, 523, the second channel 512, 522 being placed in communication with the fourth channel 514, 524. In said second position, the input channel 511, 521 is placed in communication with the fourth channel 514, 524, the second channel 512, 522 being placed in communication with the third channel 513, 523.

Said refrigeration circuit also comprises a first expansion valve 203 located between the third channel 523 of the valve 52 and the evaporator exchanger 23, and a second expansion valve 205 located between the fourth channel 524 of the valve 52 and the balancing exchanger 25.

Said liquid bottle 202 is a reservoir arranged on a branch of the refrigeration circuit defined between the link node NL1 and the inlet path 521 of the second management device 52. The liquid bottle 202 is placed on the liquid line to optimize the refrigerant charge circulating in the refrigeration circuit in all the operating modes. In the example illustrated in the figures, the sub-cooler exchanger 24 (detailed below) is located on this branch of the circuit downstream of the bottle 202.

The liquid bottle 202 is configured to trap the fluid in the vapor state which arrives at this level of the refrigeration circuit, that is to say the fluid present in the high pressure part of the circuit upstream of the 4-way valve. 52, so that it is ensured that the fluid which passes through the expansion valve (s) 203, 205 is indeed in the liquid phase in order to obtain efficient operation of the installation.

Said liquid bottle 202 in practice contains a liquid-vapor mixture of refrigerant. The liquid and vapor phases are separated by gravity. The outlet of this liquid bottle 202 draws refrigerant from the lower part of the reservoir which contains refrigerant in the liquid state.

The sub-cooler exchanger 24 comprises a first transfer circuit forming part of the refrigerating circuit 2 and arranged between the inlet passage 521 of the valve 52 and the liquid bottle 202. The sub-cooler exchanger 24 also comprises a second transfer circuit allowing the fluid which passes through it to recover heat from the fluid passing through the first transfer circuit of said exchanger 24. Said second circuit transfer of the sub-cooler exchanger 24 is mounted on the cooling circuit 33 bypassing the transfer circuit of the evaporator exchanger 23.

A first solenoid valve 333 is positioned between the inlet of the transfer circuit of the evaporator exchanger 23 and the connection of the inlet of the recovery circuit of the sub-cooler exchanger 24 on the cooling circuit 33. A second solenoid valve 334 is positioned between the inlet of the second transfer circuit of the sub-cooler exchanger 24 and the connection of this inlet of the second transfer circuit to the cooling circuit 33. Said solenoid valves make it possible to define the path traveled by the liquid in the cooling circuit 33.

The presence of the bottle 202 upstream of the first transfer circuit of the sub-cooler exchanger 24 makes it possible to ensure that the fluid which passes through the sub-cooler exchanger 24 is in the liquid state, which, in mode energy storage as detailed below, ensures a good significant transfer of heat between the first transfer circuit through which the refrigerant and the second transfer circuit through which the fluid of the cooling circuit.

The refrigeration circuit comprises a low pressure part and a high pressure part. The low pressure part corresponds to the branches of the refrigeration circuit through which the fluid passes, which are located downstream of the holder (s) and upstream of the compressor. The high pressure part corresponds to the branches of the refrigeration circuit through which the fluid flows, which are located upstream of the expansion valve (s) and downstream of the compressor.

As illustrated more particularly in figure 3 , the refrigeration circuit 2 includes a second link node NL2 between the inlet of the anti-liquid jetting bottle 201, the low pressure channel 512 of the valve 51, the low pressure channel 522 of the valve 52 and the outlet of the evaporator circuit of the exchanger 23 evaporator.

A non-return valve CAR1 is arranged between the outlet of the evaporator circuit of the evaporator exchanger 23 and said second connection node NL2 to prevent the fluid from entering the evaporator exchanger 23 through the outlet of the evaporator circuit of said exchanger.

Another non-return valve CAR2 is arranged between the first link node NL1 and the exchanger 22 to prevent a circulation of fluid from said first link node NL1 to the exchanger 22.

A check valve CAR3 is arranged between, on the one hand, the first link node NL1 and, on the other hand, a third link node NL3 between the second expansion valve 205 and the balancing exchanger 25, to prevent a circulation of fluid from said first link node NL1 to the third link node NL3 and therefore to the balancing exchanger 25.

Said circuit comprises a check valve CAR4 arranged between the fourth channel 524 of the second management device 52 and the second expansion valve 205 to prevent a flow of fluid from the expansion valve 205 to the fourth channel 524 of the valve 52.

Said installation comprises a control unit 7 which comprises control means making it possible to control the stopping and running of each of the circulation pumps 310, 320, 330, independently of one another.

The control unit is in the form of a programmable logic controller provided with a memory in which threshold values are recorded in particular as detailed below.

When, in the remainder of the description, it is specified that the unit is configured or comprises means for performing a given operation, this means that the corresponding automaton includes instructions making it possible to perform said operation.

The heating circuit 32 and the DHW circuit 31 are independent of each other. The activation or stopping of each of these circuits is carried out by starting or stopping the circulation pump of the corresponding circuit.

There are six operating modes detailed below: heating mode, simultaneous mode, cooling mode, simultaneous DHW mode, DHW only mode, and defrost mode. The PLC uses control logic to switch from one mode to another as needed.

The programmable controller is configured to control the engagement of the various operating modes according to the evolution of the building's needs. The controller can include means for determining needs using sensors and instructions as detailed below. The different operating modes are detailed below.

Heating mode is activated by the installation's control unit when it identifies a single heating need. As shown in figure 4 , activating heating mode corresponds to the following sequence of instructions. The slide of each valve 51, 52 is located in the position corresponding to placing the first channel 511.521 in communication with the fourth channel 514, 524 and therefore the third channel 513, 523 with the second channel 512.522, so as to connect the balancing exchanger 25 at low pressure and the heating exchanger 22 at the discharge of the compressor 200. At the same time, the pump 320 of the heating circuit 32 is activated, as is the fan associated with the exchanger 25 of balancing, while the DHW circuit pump 31 is stopped.

Thus, the refrigerant, which circulates in the refrigeration circuit thanks to the compressor 200, condenses in the condenser circuit of the heating exchanger 22 in order to yield its heat to the fluid circulating through the transfer circuit of said heating exchanger 22 in order to be stored in the tank 321 of the heating circuit 32. The 21 DHW exchanger behaves like a simple pipe. At the level of the balancing exchanger 25, the fan is on and the fluid is vaporized as it passes through the evaporator circuit of said balancing exchanger 25, taking heat from the outside air, then the vapors. are sucked at the level of the anti-blow liquid bottle 201.

In this operating mode, the refrigerant does not travel through the evaporator circuit to exchange it 23 evaporator, but the latter remains connected to the suction of the compressor 200 by a branch which connects it to the anti-shock bottle 201 of liquid. As recalled above, this branch, fitted with the CAR1 non-return valve, makes it possible to recover the charge trapped in the evaporator and to overcome any compressor malfunction during transitions between modes.

As detailed below, energy storage can be activated in parallel with this heating mode. For this storage, as shown in figure 2 , the pump 330 of the cooling circuit 33 is activated and the solenoid valves 333, 334 are in a position suitable for the circulation of the fluid of the cooling circuit 33 by the second transfer circuit of the exchanger 24 sub-cooler. Thus, the liquid which passes through the transfer circuit of the sub-cooler exchanger 24 yields by substantial transfer of heat to the fluid which circulates thanks to the pump 330 in the second transfer circuit of the sub-cooler exchanger 24 in order to 'be stored in the tank 331. The tank 331 can thus store hot water for use in deferred time as explained below.

During the heating period, this installation thus offers the possibility of storing a certain quantity of energy at low temperature on the cooling circuit 33 using the sub-cooler exchanger 24. This stored energy can be used in deferred time, in simultaneous and / or defrost modes, by circulation through the evaporator exchanger 23 by reversing the opening and closing order of the two solenoid valves 333, 334 (see figure 2A ).

This makes it possible to improve the performance of the installation in a simultaneous mode by raising the evaporation temperature or if necessary to defrost the balancing exchanger without having to draw heat from the medium to be heated. Indeed, the heat pump defrost logic does not draw energy from the heating tank and does not consume energy for the fan. As explained above, defrost is carried out in a special mode corresponding to cooling mode without ventilation. The energy used for defrosting comes from energy storage in the tank, which improves performance compared to the usual mode by cycle inversion according to the state of the art of so-called "air" heat pumps. / water ”.

As shown in figure 5 , another mode, called simultaneous mode, is activated by the control unit when the latter identifies a need for heating concomitant with a need for cooling. The control unit is then configured to perform the following steps. The spool of the valve 51 is in the position of placing the low pressure channel 512 in communication with the third channel 513 so that the input channel 511 communicates with the fourth channel 514. The result is that the input of the condenser circuit of the heating exchanger 22 is connected to the discharge outlet of the compressor, and that the balancing exchanger 25 is connected to the inlet of the bottle 201. Likewise, the valve spool 52 is in the position of placing the low pressure channel 522 in communication with the fourth channel 524 of so that the input channel 521 communicates with the third channel 523.

The unit also controls the activation of the pump 320 of the heating circuit 32 and of the pump 330 of the cooling circuit 33. The pump 310 of the DHW circuit 31 is stopped, so that the condenser circuit of the ECS exchanger 21 behaves like simple driving.

The solenoid valves 333, 334 are controlled so as to prevent the circulation of fluid by the second transfer circuit of the exchanger 24 sub-cooler and allow the circulation of said fluid by the transfer circuit of the exchanger 23 evaporator, so that the first transfer circuit of the sub-cooler exchanger 24 behaves like a simple pipe. Thus, the refrigerant, which circulates in the refrigeration circuit thanks to the compressor 200, condenses in the condenser circuit of the heating exchanger 22 to yield its heat to the fluid circulating through the transfer circuit of said heating exchanger 22 to be stored. in the tank 321 of the heating circuit 32. At the outlet of the heating exchanger 22, the fluid in the liquid state is directed by the valve 52 to the expansion valve 203. The refrigerant then passes through the evaporator circuit of the 'exchanger 23 evaporator where it is vaporized, while the fluid of the cooling circuit 33 circulating in the transfer circuit of the exchanger 23 is cooled.

The inlet and outlet of the condenser / evaporator circuit of the balancing exchanger 25 are found connected with the anti-liquid jetting bottle 201, which facilitates the reintegration of the charge of refrigerant trapped in the exchanger 25 d 'balancing not used in this mode.

As shown in figure 6 , another mode, called cooling mode, is activated by the control unit when the latter identifies a need for cooling alone. This refresh mode includes the following steps. The slide of each valve 51, 52 is positioned for placing the fourth channel 514, 524 in communication with the low pressure channel 512, 522. Thus, the balancing exchanger 25 communicates, on the side opposite to the link node NL3, with the discharge outlet of the compressor 200, and the other side of the balancing exchanger 25 communicates (via the bottle 202 ) with the inlet of the evaporator circuit of the 23 evaporator exchanger.

The solenoid valves 333, 334 are controlled to allow the circulation of the fluid of the cooling circuit by the transfer circuit of the evaporator exchanger 23 and the pump 330 of the cooling circuit 33 is on. The refrigerant of the refrigeration circuit then passes through the evaporator circuit of the evaporator exchanger 23 where it is vaporized while the fluid of the cooling circuit circulating in the transfer circuit of the evaporator exchanger 23 is cooled.

At the level of the balancing exchanger 25, the fan is on and the fluid leaving the compressor 200 condenses in the condenser / evaporator circuit of the balancing exchanger 25 by releasing its heat to the air.

The DHW and heating exchangers 21, 22 are not requested in this mode and are connected to the anti-shock liquid bottle 201 in order to facilitate the reintegration of the refrigerant charge.

As shown in figure 7 , another mode, called simultaneous DHW mode, is activated by the control unit when it identifies a simultaneous need for domestic hot water (DHW) and cooling. The valve spool 51 is positioned to put the third channel 513 in communication with the low pressure channel 512 so that the inlet channel 511 communicates with the fourth channel 514. Thus, the input of the condenser circuit of the exchanger 21 DHW is connected to the discharge outlet of the compressor 200 and the balancing exchanger is connected to low pressure through the inlet of the cylinder 201. Similarly, the valve spool 52 is positioned to put the fourth channel 524 in communication with the low pressure channel 522 so that the input channel 521 communicates with the third channel 523. Thus, the output of the condenser circuit of the ECS exchanger 21 communicates with the input of the evaporator circuit of the evaporator exchanger 23. The unit controls the activation of the pump 310 of the DHW circuit 31 and of the pump 330 of the cooling circuit 33.

The operation of this mode corresponds to that of the simultaneous mode with the difference that the condensation of the refrigerant takes place in the exchanger 21 ECS, and not in the heating exchanger 22 which behaves like a simple pipe.

As shown in figure 8 , another mode, called DHW only mode, is activated by the control unit when it identifies a single DHW domestic hot water need. This mode consists of the following steps. The spool of each valve 51, 52 is in the position ensuring the communication of the third channel 513, 523 with the low pressure channel 512, 522, so that each inlet channel 511, 521 communicates with the fourth channel 514, 524. Thus, the input of the condenser circuit of the exchanger 21 communicates with the discharge output of the compressor 200 and the output of the condenser circuit of the exchanger 21 communicates with the input of the condenser / evaporator circuit of the exchanger 25 balancing. The output of said condenser / evaporator circuit of the balancing exchanger 25 communicates with the input of the bottle 201. The unit controls the activation of the pump 310 of the DHW circuit 31 and preferably of the fan associated with the exchanger. 25 balancing.

The operation of this mode is similar to that of the heating mode with the difference that the refrigerant condenses in the exchanger 21 DHW, while the heat exchanger 22 behaves like a simple pipe.

As mentioned above, the installation according to the invention makes it possible to defrost the balancing exchanger 25 in defrost mode ( figure 9 ). In this In effect, the unit executes a mode, called defrost mode which comprises the following steps. For each valve 51, 52, the fourth channel 514, 524 is placed in communication with the low pressure channel 512, 522 so that the inlet channel 511, 521 communicates with the third channel 513, 523. As illustrated in figure figure 2A , the solenoid valves 333, 334 of the cooling circuit 33 are controlled so as to prevent the circulation of fluid from the cooling circuit 33 by the second transfer circuit of the exchanger 24 sub-cooler and to allow the circulation of said fluid by the circuit transfer of the exchanger 23 evaporator. The unit controls the activation of the pump 330 of the cooling circuit 33.

The unit controls the stopping of the fan 250 associated with the balancing exchanger 25. The second transfer circuit of the sub-cooler exchanger 24 being by-passed, the hot fluid previously stored in the tank 33 during a heating mode, runs through the transfer circuit of the evaporator exchanger 23 and releases its heat. to the refrigerant circulating in the evaporator circuit of said evaporator exchanger 23, which makes it possible to vaporize it and then pass through the balancing exchanger 25 and thus defrost its circuit.

The energy stored in the cold fluid tank 331 can also be used in delayed time to vaporize the refrigerant in the exchanger 23 which condenses in the exchanger 21 or 22 during a simultaneous or simultaneous DHW type mode for in which the pump 330 is started to use the energy stored in the balloon 331.

When the balancing exchanger 25 operates either as a condenser or as an evaporator, the refrigerant flows through all the tubes of the balancing exchanger.

As shown in figure 10 , each tank 31, 32, 33 is equipped with a temperature probe Tecs, Teec, Teef disposed inside said tank. The compressor 200 is equipped with an inlet LP pressure sensor and an outlet HP pressure sensor. The refrigeration circuit preferably comprises a Teea temperature sensor located at the inlet of the balancing exchanger 25 and a Tcross temperature sensor located on the outer surface of the condenser / evaporator circuit of the balancing exchanger 25. Said control unit 7 is configured to control the passage from one operating mode of the installation to another as a function of the measured pressure and temperature values and of predefined threshold values.

In one of the applications of the invention, the building's heating, cooling and domestic hot water needs are determined by value comparison operations carried out using differential thermostats and comparators. As shown in figure 11 , the differential thermostats include a heating thermostat making it possible to define the need for heating, a cooling thermostat making it possible to define the need for cooling, and a domestic hot water thermostat making it possible to define the need for domestic hot water. CECS, CCH and CRAF are setpoint temperature values, and DIFECS, DIFCH and DIFRAF are temperature differential values.

As shown in figure 12 , when the difference between the dew point temperature Trosée of the refrigerant calculated from the LP pressure at the compressor suction, and the temperature Teea measured at the inlet of the balancing exchanger 25 exceeds a certain threshold, noted SDGIV, the defrost mode is engaged. The dew point temperature is determined from an equation with as input parameter the measurement of the LP pressure at the compressor inlet. When the surface temperature Tcross of the balancing exchanger 25 is greater than a certain threshold SFDGIV, the defrosting phase is stopped.

The figure 13 illustrates a switching control logic in simultaneous mode (“simultaneous switching”) or in heating mode (“switching heater "). Switching to simultaneous mode when operating in heating mode is managed by another differential thermostat. CSR is a setpoint temperature value and DIFSR is a temperature differential value.

By way of example, performance tests according to standard EN14511 were carried out on a prototype heat pump in accordance with the invention using propane as refrigerant. The test results are presented below in connection with the figures 14 to 16 .

The performances are calculated from test readings in stationary mode. A 30 minute stabilization period precedes the one hour steady state acquisition period. The data acquisition step is 10 seconds. The consumption of the pumps and the fan is taken into account in the calculation of the Coefficient of Performance (COP) and the cooling energy efficiency (EER) of the heat pump.

The figure 14 presents the coefficient of performance (COP) of the heat pump in heating mode as a function of the air temperature for a hot water production temperature of 35 ° C ("COP 35 ° C" curve) and 45 ° C (curve "COP 45 ° C"). At a hot water production regime of 35 ° C, the calorific power produced is 11 kW at -7 ° C outside air and 17.5 kW at 7 ° C.

The figure 15 presents the cooling energy efficiency (EER) of the heat pump in cooling mode for different air temperatures with production of cold water at 7 ° C ("EER SEF 7 ° C" curve) and 14 ° C ("curve" EER SEF 14 ° C "). The cooling capacity delivered varies according to the speeds from 13.4 to 19 kW.

The figure 16 presents the coefficient of performance (COP) of heat pump in simultaneous mode as a function of the water temperature at the outlet of the heating exchanger and for a cold water production temperature of 7 ° C ("TFP SEF 7 ° C" curve) and 15 ° C (curve "TFP SEF 15 ° C"). These tests show that the calorific power varies between 23 and 16 kW and the cooling capacity between 10 and 18 kW.

The present invention is in no way limited to the embodiments described and shown, but those skilled in the art will know how to make any variant thereto while remaining within the scope of the invention as defined by the claims.

Claims (18)

1. A refrigerating circuit (2) for a facility, called thermorefrigerating pump (1), for the heating and/or cooling of fluids, comprising:

   - a compressor (200),

   - an exchanger (21, 22), called condenser exchanger, comprising a condenser circuit,

   - an exchanger (25), called balancing exchanger, comprising a circuit called condenser/evaporator circuit able to operate either as a condenser or as an evaporator, and preferably a fan associated with said balancing exchanger,

   - a first connecting node (NL1) between a branch of the refrigerating circuit (2) provided with the condenser exchanger (21, 22) and a branch of the refrigerating circuit (2) provided with the balancing exchanger (25), said connecting node being located on the side of the outlet of the condenser exchanger (21, 22),

   - an exchanger (23), called evaporator exchanger, comprising an evaporator circuit,

   - a first fluid management device (51) comprising four paths, including:

   - a first path, called inlet path (511), connected to the outlet of the compressor,

   - a second path, called low pressure path (512),

   - a third path (513) connected to the balancing exchanger (25) on the side opposite the first connecting node (NL1), and

   - a fourth path (514) connected to the inlet of said condenser exchanger;

   - a second fluid management device (52) comprising four paths, including:

   - a first path, called inlet path (521), connected to said first connecting node (NL1),

   - a second path, called low pressure path (522),

   - a third path (523) connected to the inlet of the evaporator exchanger (23), and

   - a fourth path (524) connected to the balancing exchanger (25), between the first connecting node (NL1) and the condenser/evaporator circuit of the balancing exchanger (25);

   - a first expansion valve (203) located between the third path (523) of the second fluid management device (52) and the evaporator exchanger (23), and

   - a second expansion valve (205) located between the fourth path (524) of the second fluid management device (52) and the balancing exchanger (25),
   the second paths (512, 522) of the management devices being connected (NL2) to a branch of the refrigerating circuit that extends between the outlet of the evaporator circuit of the evaporator exchanger (23) and the inlet of the compressor (200);
   each fluid management device (51, 52) being configured to selectively assume a first configuration in which the inlet path (511, 521) is placed in communication with the third path (513, 523), the low pressure path (512, 522) being placed in communication with the fourth path (514, 524),
   and a second configuration in which the inlet path (511, 521) is placed in communication with the fourth path (514, 524), the low pressure path (512, 522) being placed in communication with the third path (513, 523).
2. The refrigerating circuit (2) according to claim 1, characterized in that the refrigerating circuit also includes an exchanger (24), called subcooler exchanger, that comprises a first heat transfer circuit arranged between the inlet path (521) of the second management device (52) and the first connecting node (NL1), and preferably arranged between said inlet path (521) and a liquid canister (202).
3. The refrigerating circuit (2) according to one of the preceding claims, characterized in that said first fluid management device (51) is a four-way valve that comprises a member, called slide valve, movable between two positions respectively corresponding to said first and second configurations of the first fluid management device.
4. The refrigerating circuit (2) according to one of the preceding claims, characterized in that said second fluid management device (52) is a four-way valve that comprises a member, called slide valve, movable between two positions respectively corresponding to said first and second configurations of the second fluid management device.
5. The refrigerating circuit (2) according to one of the preceding claims, characterized in that said circuit comprises a reservoir (201), called shockproof liquid canister, positioned between the compressor (200) and the connector (NL2) of the second management device paths (51, 52).
6. A facility comprising a refrigerating circuit (2) according to one of the preceding claims, characterized in that, the condenser exchanger (21, 22) comprising a heat transfer circuit, said facility includes a heating circuit (31, 32) that comprises said transfer circuit of said condenser exchanger (21, 22), a circulation pump (310, 320), and preferably a fluid storage reservoir, called hot water tank;
   and in that, the evaporator exchanger (23) comprising a heat transfer circuit, said facility includes a cooling circuit (33) that comprises said transfer circuit of the evaporator exchanger (23), a circulation pump (330), and preferably a fluid storage reservoir, called cold water tank (331).
7. The facility according to claim 6, the refrigerating circuit of which is according to claim 2, characterized in that, the subcooler exchanger (24) comprising a second transfer circuit, said second transfer circuit of the subcooler exchanger (24) is mounted on the cooling circuit (33) on a bypass from the transfer circuit of the evaporator exchanger (23).
8. The facility according to claim 7, characterized in that a first solenoid valve (333) is positioned between the inlet of the transfer circuit of the evaporator exchanger (23) and the connection of the inlet of the second transfer circuit of the subcooler exchanger (24) to the cooling circuit (33).
9. The facility according to claim 7 or 8, characterized in that a second solenoid valve (334) is positioned between the inlet of the second transfer circuit of the subcooler exchanger (24) and the connection of this inlet to the second transfer circuit of the subcooler exchanger (24) to the cooling circuit (33).
10. The facility according to one of claims 6 to 9, characterized in that it includes a control unit (7) configured to carry out a sequence of instructions, called heating mode, comprising the following steps:

    - for each of the first and second management devices (51, 52), placing the fourth path (514, 524) in communication with the first path (511, 521);

    - activating the pump (320) of the heating circuit (32),

    - preferably activating the fan associated with the balancing exchanger (25).
11. The facility according to one of claims 6 to 10, characterized in that it includes a control unit (7) configured to carry out a sequence of instructions, called simultaneous mode, comprising the following steps:

    - for the first management device (51), placing the first path in communication with the fourth path;

    - for the second management device (52), placing the first path in communication with the third path;

    - activating the pump (320) of the heating circuit (32) and the pump (330) of the cooling circuit (33).
12. The facility according to any one of claims 6 to 11 combined with claim 7, characterized in that it includes a control unit (7) configured to carry out a sequence of instructions, called energy storage mode, comprising the following steps: in heating mode, activating the pump (330) of the cooling circuit and commanding the solenoid valves (333, 334) so as to allow the fluid from the cooling circuit (33) to circulate through the second transfer circuit of the subcooler exchanger (24), and the corresponding tank (331).
13. The facility according to one of claims 6 to 12, characterized in that it includes a control unit (7) configured to carry out a sequence of instructions, called refresh mode, comprising the following steps:

    - for each management device (51, 52), placing the first path in communication with the third path;

    - activating the pump (330) of the cooling circuit (33),

    - preferably activating the fan (250) associated with the balancing exchanger (25).
14. The facility according to one of claims 12 or 13, combined with claims 8 and 9, characterized in that the control unit (7) is configured to carry out a sequence of instructions, called usage mode of the energy stored in the cooling circuit, which comprises the following steps: in delayed time relative to the performance of the energy storage mode and in an operating mode of the facility corresponding to the simultaneous mode or the refresh mode preferably without fan, activating the pump (330) of the cooling circuit and commanding the solenoid valves (333, 334) so as to allow the hot fluid contained in the tank (331) of the cooling circuit (33) to circulate through the transfer circuit of the evaporator exchanger (23).
15. The facility according to one of claims 6 to 14, characterized in that, said heating circuit (31) being a hot domestic supply water heating circuit, called ECS circuit (31), said facility includes a control unit (7) configured to carry out a sequence of instructions, called simultaneous ECS mode, comprising the following steps:

    - the first management device (51), placing the first path in communication with the fourth path;

    - for the second management device (52), placing the first path in communication with the third path;

    - activating the pump (310) of the ECS circuit (31) and the pump (330) of the cooling circuit (33).
16. The facility according to one of claims 6 to 15, characterized in that, said heating circuit (31) being a hot domestic supply water heating circuit, called ECS circuit (31), said facility includes a control unit (7) configured to carry out a sequence of instructions, called ECS mode only, comprising the following steps:

    - for each management device (51, 52), placing the first path in communication with the fourth path;

    - activating the pump (310) of the ECS circuit (31) and preferably the fan associated with the balancing exchanger.
17. The facility according to one of claims 6 to 16, characterized in that it includes a control unit (7) configured to carry out a sequence of instructions, called deicing mode, comprising the following steps:

    - for each management device (51, 52), placing the first path in communication with the third path;

    - the solenoid valves are commanded so as to prevent the fluid from circulating from the cooling circuit (33) through the second transfer circuit of the subcooler exchanger (24) and to allow said fluid to circulate through the transfer circuit of the evaporator exchanger (23),

    - activating the pump (330) of the cooling circuit (33),

    - preferably stopping the fan (250) associated with the balancing exchanger (25).
18. A method for heating and/or cooling fluids using a facility (1) according to one of claims 10 to 17, characterized in that said method comprises the performance by the control unit (7) of said sequence of instructions.

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